The importance of keeping the head still through the swing is one of the first things that any golfer learns.
This isn't quite so difficult if you have a short swing and there isn't very much body movement, but as soon as you increase your back swing there will be more head movement just through the action that your body will need to take to complete the action.
A good comparison that I read elsewhere was to that of throwing a stone.
If you are only throwing the stone a short distance then it is quite possible to keep the body still and manage to throw the stone with the action of your arm.
Once you try to throw the stone a substantial distance you will need to introduce body movement to get that distance.
Golf is similar to throwing the stone and the bigger the swing the more your body is going to want to move.
To hit the perfect golf shot your head must remain behind the line of the ball throughout the swing and including the point of impact with the clubface and the ball.
In order to maintain this action many golfers will tilt their head to the right (if they are right-handed) to ensure that their head remains behind the ball when they swing.
It is a positive action that reinforces the movement and ensures they consistently keep control throughout the swing.
If you find that you tend to slice the ball when you hit it, try turning your head slightly in the direction of the back foot just before you swing, always maintaining eye contact with the ball and see if this improves your control and accuracy.
It works well for several professional players so it might just be the change in technique that can turn your game around.
